Believe it or not, thanks to ScummVM being in the iOS/iPad OS App Store now, I have actually played that game on my iPad. You'd be amazed at how well it's held up. It looks really good on an iPad, and the point and click nature of it fits touchscreens perfectly.
"You're going to listen to this U2 album, and you're going to like it!" -- Tim Apple
Studs from Microsoft was a parody of this format, with the "studs" replaced by Microsoft programming nerds, from Seattle area sketch comedy show Almost Live!. It is also notable for featuring a pre-Science-Guy Bill Nye.
They were fun to run through.
I had all the other major consoles at the time except the Sega CD so I never got to own it at home, but the idea of playing through an actual episode of Power Rangers while pressing buttons that correspond to the actions taken by the actual characters just felt so cool. All the other Power Rangers games were either fighting games or belt-scroll beat-'em-ups, but this one let me play through an actual episode!
...and then I emulated it as an adult and realized it was just a pile of QTEs with no real game and that the video quality was abject dogshit. But the beat-'em-ups still hold up, to the point where they're making a new one now.
D: disc1, E: disc2, F: disc3, G: disc4, H:empty I:empty: J:empty.
The game was kind enough to let you specify different drives for the discs rather than assuming a single swapping situation, though it would check them all at launch time, which was quite a slow affair. But once it was going, it was great; as you moved between regions in the game, the drive would simply change discs and spin up the new one and away you went.
ISTR they did a certain amount of duplication, some overlap between regions would be on both discs, so it wouldn't require swapping constantly if you were right on a border. But at some points it would flip back and forth, and the changer made all the difference.
I think you're right that some of the data was duplicated. I can't remember if any other multi-cd games allowed assigning different drive letters to different discs. Also works with DOSbox
dang has talked about this before, but there are a number of users who were rightfully banned, go on to post nothing but healthy, constructive comments that almost always get vouched, and then immediately turn abusive again when they're unbanned. So the current moderation philosophy is to leave them banned and let users vouch their comments, which works out better for everyone.